The Number Devil

Twelve-year-old Robert thinks maths is boring. Then in his dreams he meets the number devil, who introduces him to lots of interesting things that we can do with numbers. Together they explore concepts such as square and triangle numbers, prime numbers, exponentials, Fibonacci numbers, irrational numbers and more, all explained step-by-step with diagrams and concrete examples. This book is a great resource for older children who are interested in understanding the world of maths.